Polishing-machine.



J. PURSBHOUSE.

POLISHING MACHINE; APPLICATION FILED FEB. 1, 1909.

Patented June 14, y1910.

UNITED. STATES PATENT OFFICE.

J OE PURSEHOUS, OF STREATOR, ILLINOIS.

POLISHING-MACHINE.

Specification of Letters Ratent.

Patented June 14, 1910.

Application led February 1,1909.v Serial No. 475,399.

y is a specification.

the same,

This invention is a polishin machine designed more particularly orpolishing stoves, and it has for its object to provide in a machine ofthis kind an improved brush holder which permits the use of' diilerentkinds of brushes, and with this object in' view, the invention consistsin a novel! construction and arrangement of parts to be hereinafterdescribed and claimed, reference being had to the drawing heretoannexed.

Figure 1 is an elevation of the machine. Fig. 2 is asimilar view, partlyin section. Fi 3 is a plan view of the brush head.

lin the drawing 5 denotes a. casing in which is supported an electricmotor, which may be of any type. The casing has an extension 7 at itsfront end, which is preferably made hollow in order to reduce the weightof the machine. The extension is formed with a bearing 8 for supportingthe armature shaft 9 of the motor, and said extension also serves as oneof the handles of the machine, as will be presently described. The shaft9 extends lengthwise through the extension, and projects a shortdistance from the outer end thereof, and carries thev polishing brush.

The head of the polishing brush is a circular disk 10, having a centralperforation l1, and a series of perforations 12 around in which latterperforations the bristles 130i the brush are secured. The brush head isreceived in a holder which is a disk 14, of sli htly greater diameterthan the disk 10, and tIiavlng an futstanding marginal flange 15, and acentral opening 16. The outer end of the shaft 9 is reduced andscrew-threaded as 'indicated at 17. The

vbrush is mounted on a shaft by placing the disk 10 on the disk 14within the ilange 15 of the latter. `In this osition the openings 11 and16 register, and1 the reduced end 17 of the shaft 1s passedtherethrough. A nut 18 is then screwed on the projecting end of theshaft against the outer face of the disk 10, whereby said disk and thedisk 111 are clamped together, the rear face' of the latter diskengaging the shoulder formed by the reduced'l end of the shaft, wherebythe-'two disks are rigidly mounted on the shaft.

' In practice, a number of disks 10, fitted with different kinds ofbristles, will be provided, in order that the machine may be employedfor polishing stoves having nickeled parts, and also for polishing otherarticles. The change from one brush to another can be quickly and easilymade, it being necessaryuonly to unscrew the nut 18, and replace thedisk 10 with another one having the kind of bristles suitable for thework.

On the rear end of the motor casing is mounted a handle comprising apair of bracket arms 19,' connected at their outer ends by a grip 20,provided with means for controlling the operation of the machine. Thegrip comprises sleeves 21 and 22 respectively, which are insulated fromthe bracket arms by an insulating sleeve 23, and from each other by aninsulating sleeve 24. These sleeves are placed end to end on a bolt orrod 25, connecting the outer ends of the bracket arms 19, said boltbeing secured by a nut 26, screwed on the threaded end projecting fromone of the bracket arms. The sleeves 21 and 22 are insulated from thebolt by insulating bushings 27. To the sleeve 21 is secured, so as to bein electrical connection therewith, a switch tongue 28, which projectsinthe-direction of sleeve 22 and is adapted to make contact therewith bybeing pressed thereagainst. The switch is normally held out of contactwith the sleeve 22 by a spring 29, secured to" the `insulating sleeve241.

The motor is adapted to be operated by a storageba'ttery, showndiagramniatically at 30 in Fig. 1. If preferred, any other suit ablesource of electric" energy may vbe employed. The wire 31 from one sideof the battery is connected to the sleeve 21, and from the sleeve 22 awire 32 connects with one of the terminals 34 of the motor. The otherwire 35 of the battery is connected to the other terminal 36 of themotor.

In use, the operator holdsithe machine by grasping the extension 7 withone hand, and the grip 2O with the other. In this manner the machine canbe easily handled, and as the switch which controls the motor is locatedon the Grip, the machine is undenperfeet control oil the operator at alltimes, and can be readily stopped and started at will.

If the machine is connected to a power circuit it may be necessary toprovide an insulation for the switch 28, and also for those portions ofthe grip 2() which are inY contact with the operators hand. However, asthis is a matter of mechanical expediency, I have not thought itnecessary to illustrate the same.

What is claimed is:-

In a brushing machine, a pair of disks having registering centralopenings, a drive shaft received in said openings, means for securingthe disks on said shaft, bristles secured to one of the disks said disksbeing removably mounted on the shaft, and an outstanding marginal flangeon the other disk surrounding the inner ends of the bristles.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

JOE PURSEHOUSE.

Witnesses:

W. J. HEINEKE, ROBERT PEDELTY.

